底摆边高就是底边到折边的宽度。
The hem allowance is the width between the hemline and the hem edge.
采用边坡某一幅值的等效塑性剪应变区，从坡脚到坡顶贯通前的折减系数作为边坡安全系数。
The strength reduction coefficient before a well-defined equivalent plastic shear strain (EPSS) running through from the bottom to the top of a slope is considered as its safety factor.
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